Study of the origin of an epizootic of classical swine fever.
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Biomedical subjects
Publications and source records attributed to J Josse.
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24 deep toxic comas with respiratory assistance were studied by brain-stem reflex and BAEP. Laboratory analysis showed several simultaneous toxics (phenobarbital, benzodiazepines, tricyclic antidepressants...). Three groups of patients were defined: Twelve patients with normal BAEP and with relatively preserved brain-stem reflex (oculocephalic and oculovestibular are often disturbed but photomotor is present). Eleven patients with delayed BAEP and with more disturbed brain-stem reflex (photomotor is missing 3 times). In 2 cases (one of which is mentioned above in group B) brain-stem reflex and BAEP disappear and these patients die. Cerebral anoxia is associated here with toxics. Causes of delayed latencies (group B) are discussed (hypothermia, toxics). BAEP seems important in diagnosis and prognosis of toxic coma.
An ecopathological study was conducted in Brittany (France) in 89 conventional herds in order to identify the main circumstances that permit the onset of weaning disorders. By comparing the different practices in affected and non-affected herds using multidimensional data analysis methods, a combination of 10 variables was found. These variables are considered as predisposing factors and called "risk factors". They are connected and have a cumulative effect. Preparation to weaning (piglets' weights at weaning, feeding level ingested during suckling period) and environmental conditions of reception of the weaned piglet such as housing requirements are needed.
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